DE102016117943A1 - An electronic component housing that detects deposited cutting fluid and a motor drive system that includes the housing - Google Patents

Abstract

It is a motor drive system that enables the detection of cutting fluid deposited on a housing of electronic components. A housing holding electronic components of a motor drive system has upper surfaces that are inclined with respect to the horizontal plane to direct the deposited cutting fluid. The housing further includes storage portions that collect the cutting fluid conducted along the upper surfaces. The storage sections may be provided with a scale to allow measurement of the collected amount of the cutting fluid. The memory sections can be designed in this way. that they are removable from the housing.

Description

GENERAL PRIOR ART

1. Field of the invention

The present invention relates to a housing holding electronic components, and a motor drive system having this housing.

2. Description of the Related Art

A motor drive system for driving a machine tool is used in an environment where dust, cutting fluid and other foreign matter fill the air. The electronic components that constitute the motor drive system are housed in a control console in the form of a cabinet and protected from these foreign substances. In fact, it is difficult to completely prevent the intrusion of foreign matter into the interior of the control panel.

If foreign substances adhere to the electronic components inside the control console, they will cause corrosion of the electronic components over the years and may cause malfunction of the motor drive system. Therefore, proposals have been made to prevent the deposition of foreign matter or to detect the deposition of foreign matter early.

The Japanese Patent Laid-Open Publication No. 2006-019405A discloses a printed circuit board having a circuit for detecting a deterioration or malfunction of the printed circuit board due to contaminants such as dust or cutting fluid deposited on the printed circuit board.

In the related art, a mechanism has been provided for preventing deposition of foreign matter on electronic components to direct cutting fluid away from the housing of the electronic components, or the electronic components have been placed at locations resistant to deposition of cutting fluid. Alternatively, in order to prevent cutting fluid from filling the air, it has been proposed not to use a blower motor for cooling purposes.

BRIEF SUMMARY OF THE INVENTION

According to the above-mentioned related art of protecting electronic components by a case having a directing mechanism, an effect of preventing cutting fluid deposition can be expected to some extent. However, the cutting fluid that has been moved away from the housing by the directing mechanism drips down to the place where the motor driving system is set, so that it is difficult to detect the amount of the cutting fluid entering the inside of the control panel , Therefore, what is needed is a motor drive system configured to detect cutting fluid entering the interior of the control console and to cause preventive action to be taken before malfunction of the motor drive system occurs.

According to the present invention, there is provided a housing holding electronic components of a motor drive system for driving a machine tool, the housing having at least one guide portion for conducting cutting fluid to a surface of the housing and at least one storage portion for collecting the cutting fluid passed through the guide portion.

In a preferred embodiment, the surface is inclined with respect to a horizontal plane, and the at least one guide portion is adapted to guide the cutting fluid by the action of gravity.

In a preferred embodiment, at least one storage portion is provided with a scale in the housing to allow measurement of the cutting fluid collected in that storage portion.

In a preferred embodiment, in the case of the housing, the at least one storage section can be detached from the housing.

In a preferred embodiment, the housing is provided with a plurality of guide sections and storage sections.

In a preferred embodiment, there is provided a motor drive system comprising the above housing, an electronic component held in the housing, and a detection section for detecting the amount of cutting fluid collected in the at least one storage section.

In a preferred embodiment, the motor drive system further comprises an alarm section that issues an alarm signal when the amount of cutting fluid stored in the at least one storage section exceeds a predetermined threshold.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other objects, features and advantages of the present invention will become more apparent by referring to the detailed description of illustrative embodiments of the present invention shown in the drawings.

1 is a conceptual view of a motor drive system.

2 FIG. 15 is a perspective view of a housing holding electronic components of a motor driving apparatus according to an embodiment. FIG.

3 is a sectional view of the housing of 2 along the plane passing through lines III, III '.

4 is a view showing a housing according to another embodiment.

DETAILED DESCRIPTION

Embodiments of the present invention will be explained below with reference to the accompanying drawings. In support of the understanding of the present invention, the scale of the constituent elements in the illustrated embodiments is appropriately changed. Furthermore, the same or corresponding constituent elements use the same reference numerals.

1 is a conceptual view, which is a motor drive system 10 shows. The motor drive system 10 has several electronic components 14 on. The electronic components 14 include printed circuit boards and components mounted on the printed circuit boards, and any other components. The electronic components 14 are in a control console 12 housed in the form of a cupboard. The control console 12 has an openable door and is designed so that it is accessible from the outside if necessary. The control console 12 forms an interior which is generally sealed in the condition that the door is closed.

The motor drive system 10 controls motors (not shown) used to drive shafts of a machine tool. When a machine tool is used to machine a workpiece, a cutting fluid is used to suppress wear and cooling. The motor drive system 10 is used in an environment where not only the cutting fluid but also chips generated by the workpiece etc. fill the air. As explained above, the control console makes 12 a sealed interior, but cutting fluid sometimes penetrates through gaps on the door, etc. in the interior.

Therefore, the motor drive system 10 according to the present invention designed so that it is a housing 20 that has the electronic components 14 Keeps and prevents cutting fluid, dust and other foreign matter on the electronic components 14 deposit.

With reference to 2 and 3 becomes the case 20 for holding the electronic components 14 of the motor drive system 10 be explained. 2 is a perspective view of the housing 20 shows while it is 3 around a sectional view of the housing 20 from 2 along the plane extending in the vertical direction and passing through line III and line III '.

The housing 20 has a hollow body 22 with a generally boxy shape. The body 22 has a rectangular bottom 22a , Side walls 22b that are different from the ground 22a extend upward in the vertical direction, and a top 22c one through the side walls 22b formed upwardly facing opening closes on.

The top 22c has the shape of an upwardly extending quadrilateral pyramid. In other words, the surfaces are the top side 22c inclined so as to form predetermined angles with respect to the horizontal plane.

The top 22c has four memory sections along its circumference 26 on. The storage sections 26 are box-shaped containers that are open facing upwards. As with reference to 3 be clearly understood are between the memory sections 26 and the top 22c no step differences available. They are generally smoothly connected.

According to the housing having the structure described above, cutting fluid moving toward the top moves 22c of the housing 20 dripping down, due to the action of gravity (see the arrows in 3 ) along the surfaces of the top 22c down and it will be at the memory sections 26 collected. The hatched areas in 3 show the cutting fluid X in the storage sections 26 ,

In this way, according to the present embodiment, the inclined surfaces acting through the top 22c are formed, as guide portions, the cutting fluid X to the storage sections 26 conduct. This allows an operator to Amount of the cutting fluid C in the storage sections 26 is collected, visually determine. Therefore, the operator can the airtightness of the control panel 12 improve or the location of the device of the motor drive system 10 as necessary to thereby take preventive measures to prevent the engine system from causing problems.

Further, it is after the motor drive system 10 According to the present embodiment, possible problems in the motor drive system 10 due to the deposition of the cutting fluid X, so that it is possible to use a cooling fan motor. As a result, the freedom of the thermal engineering design is increased.

Furthermore, since the memory sections 26 on the sides of the top 22c of the housing 20 are provided, the operator can estimate the path of penetration of the cutting fluid X. This allows the operator to choose effective measures to prevent the penetration of the cutting fluid X.

In one embodiment, the memory sections 26 be executed with scales. In this case, the operator can change the scales of the memory sections 26 read and thereby the amounts of the cutting fluid X in the storage sections 26 measure quantitatively.

In one embodiment, the memory sections 26 be designed so that they are from the housing 20 are removable. In this case, the operator can use the memory sections 26 from the control console 12 take the cutting fluid eliminate X, and the memory sections 26 wash, which makes maintenance easy. Furthermore, it is in case of damage of a memory section 26 possible, the memory section 26 to replace at low cost.

In the illustrated embodiment, there are four memory sections 26 around the top 22c provided around. However, in another embodiment, three or fewer memory sections may be used 26 be formed. Alternatively, five or more memory sections may be formed.

In another embodiment, the housing may have a conical shape. In still another embodiment, the guide portions for guiding the cutting fluid to the storage portions may be furrows formed in the surface of the housing and extending at an incline with respect to the horizontal plane.

4 shows a housing 20 according to another embodiment. In the present embodiment, the housing 20 with a weight detector 30 fitted. Furthermore, the electronic components 14 a detection section 32 and an alarm section 34 on.

The weight detector 30 is designed to the weights of the memory sections 26 and thus the weight of the cutting fluid X in the storage sections 26 to detect.

The detection section 32 is designed to be from the output of the weight detector 30 the amount of the cutting fluid X collected in the storage sections finds out.

The alarm section 34 is adapted to output an alarm signal when passing through the detection section 32 amount of cutting fluid X exceeds a predetermined threshold. The motor drive system 10 sends a warning by sound, light, etc. to the operator in response to an alarm signal.

According to the present embodiment, an operator must have the storage sections 26 do not check directly. The operator can be alerted when the amount of cutting fluid X that is in the storage sections 26 collected exceeds a predetermined amount. The operator can take action as required upon receipt of the alert, thereby causing problems in the motor drive system 10 can be prevented.

In another embodiment, the motor drive system may be configured to use it instead of a weight detector 30 used an optical detector to obtain the amount of cutting fluid X.

While various embodiments of the present invention have been explained above, those skilled in the art will recognize that other embodiments may be utilized to achieve the effects and effects intended by the present invention. In particular, constituent elements of the above-explained embodiments may be omitted or substituted without departing from the scope of the present invention, and further known means may be added. Further, the fact that the features of the several embodiments, which are explicitly or implicitly disclosed in this specification, may also be freely combined to practice the present invention will be apparent to those skilled in the art.

After the housing and the housing-comprising motor drive system according to the present invention, cutting fluid entering the inside of the control panel moves through Effect of the guide sections along the surface of the housing and it is collected in the storage sections. This allows an operator to visually detect the penetrating cutting fluid and be prompted to take preventive action as necessary before encountering problems with the motor drive system.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• JP 2006-019405 A [0004]

Claims (7)

Casing ( 20 ), the electronic components of a motor drive system ( 10 ) for driving a machine tool, wherein the housing at least one guide section ( 22c ) for guiding cutting fluid (X) on a surface of the housing and at least one storage section ( 26 ) for collecting the cutting fluid conducted through the guide portion. A housing according to claim 1, wherein the surface is inclined with respect to a horizontal plane, and the at least one guide portion is adapted to guide the cutting fluid by the action of gravity. Housing according to claim 1 or 2, wherein the at least one storage portion is provided with a scale to allow a measurement of the cutting fluid, which is collected in this storage section. Housing according to one of claims 1, 2 and 3, wherein the at least one storage portion can be removed from the housing. A housing according to any one of claims 1 to 4, wherein a plurality of lead portions and a plurality of storage portions are provided. A motor drive system comprising: a housing according to any one of claims 1 to 5, an electronic component held in the housing, and a detection section (12); 32 ) for detecting the amount of the cutting fluid collected in the at least one storage portion. Motor drive system according to claim 6, further comprising an alarm section ( 34 ) which outputs an alarm signal when the amount of the cutting fluid stored in the at least one storage section exceeds a predetermined threshold.

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